package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class ReportServiceImpl implements ReportService {


    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private WorkspaceService workspaceService;


    public TurnoverReportVO turnoverStatistics(LocalDate begin, LocalDate end) {
        /**
         *    //日期，以逗号分隔，例如：2022-10-01,2022-10-02,2022-10-03
         *     private String dateList;
         *
         *     //营业额，以逗号分隔，例如：406.0,1520.0,75.0
         *     private String turnoverList;
         */
        List<LocalDate> list = new ArrayList<>();
        list.add(begin);
        while(!begin.equals(end)) {
            // 指定日期的后一天
            begin = begin.plusDays(1);
            list.add(begin);
        }
        List<Double> turnoverList = new ArrayList<>();
        for (LocalDate date : list) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();
            map.put("begin", beginTime);
            map.put("end", endTime);
            map.put("status", Orders.COMPLETED);
            Double amount = orderMapper.getSumBymap(map);
            amount = amount == null ? 0.0 : amount;
            turnoverList.add(amount);
        }


        return TurnoverReportVO
                .builder()
                .turnoverList(StringUtils.join(turnoverList, ","))
                .dateList(StringUtils.join(list, ","))
                .build();

        }

    /**
     * 用户统计
     * @param begin
     * @param end
     * @return
     */
    public UserReportVO userStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while(!begin.equals(end)) {
            // 指定日期的后一天
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        List<Integer> userTotalList = new ArrayList<>();//总数
        List<Integer> newTotalList = new ArrayList<>();//新增
        //写一个动态sql select count(id) from user where creat_time < and creat_time >
        for(LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();
            map.put("end", endTime);//这里的字段名是要和xml文件中的名字对应。
            Integer dayTotal = orderMapper.getCountBymap(map);
            //注意这里放的顺序，要考虑到查询的先后，先查每一天的总用户数。
            map.put("begin", beginTime);
            Integer sumBymap = orderMapper.getCountBymap(map);
            newTotalList.add(sumBymap);
            userTotalList.add(dayTotal);
        }
        return UserReportVO
                .builder()
                .dateList(StringUtils.join(dateList,","))
                .totalUserList(StringUtils.join(userTotalList,","))
                .newUserList(StringUtils.join(newTotalList,","))
                .build();

    }

    /**
     * 统计指定时间内的订单数据
     *
     * @param begin
     * @param end
     * @return
     */
    public OrderReportVO OrderStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while(!begin.equals(end)) {
            // 指定日期的后一天
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        List<Integer> dayorderTotalList = new ArrayList<>();
        List<Integer> daysuccessorderList = new ArrayList<>();
        for(LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();
            map.put("begin", beginTime);
            map.put("end", endTime);
            //查询每天订单总数
            Integer dayTotal = orderMapper.getCountBymap2(map);
            //查询每天有效订单数
            map.put("status", Orders.COMPLETED);
            Integer daysum = orderMapper.getCountBymap2(map);
            dayorderTotalList.add(dayTotal);
            daysuccessorderList.add(daysum);
        }
        Integer totalOrderCount = dayorderTotalList.stream().reduce(Integer::sum).get();
        Integer validOrderCount=daysuccessorderList.stream().reduce(Integer::sum).get();
        Double orderCompletionRate=0.0;
        if(totalOrderCount!=0){
            orderCompletionRate=validOrderCount.doubleValue()/totalOrderCount;
        }
        return OrderReportVO
                .builder()
                .dateList(StringUtils.join(dateList,","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .orderCountList(StringUtils.join(dayorderTotalList,","))
                .validOrderCountList(StringUtils.join(daysuccessorderList,","))
                .build();
    }

    @Override
    public SalesTop10ReportVO top10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
        Map map = new HashMap();
        map.put("begin", beginTime);
        map.put("end", endTime);
        map.put("status", Orders.COMPLETED);
        List<GoodsSalesDTO> goodsSalesDTOlist = orderMapper.gettopBymap(map);

        List<String> nmaeList =goodsSalesDTOlist.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        List<Integer> numberlist =goodsSalesDTOlist.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());


        return SalesTop10ReportVO.builder()
                .nameList(StringUtils.join(nmaeList,","))
                .numberList(StringUtils.join(numberlist,","))
                .build();
    }

    public void exportBusinessData(HttpServletResponse response) {
        //1. 查询数据库，获取营业数据---查询最近30天的运营数据
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);

        //查询概览数据
        BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));

        //2. 通过POI将数据写入到Excel文件中
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

        try {
            //基于模板文件创建一个新的Excel文件
            XSSFWorkbook excel = new XSSFWorkbook(in);

            //获取表格文件的Sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");
            //填充数据--时间
            sheet.getRow(1).getCell(1).setCellValue("时间：" + dateBegin + "至" + dateEnd);

            //获得第4行
            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());

            //获得第5行
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());

            //填充明细数据
            for (int i = 0; i < 30; i++) {
                LocalDate date = dateBegin.plusDays(i);
                //查询某一天的营业数据
                BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));

                //获得某一行
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }

            //3. 通过输出流将Excel文件下载到客户端浏览器
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);

            //关闭资源
            out.close();
            excel.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }
}

